fvwm-xdg-menu is an xdg application menu with full support for the additional freedesktop categories. It was developed with fvwm in mind, but provides an xdg compliant application menu infrastructure and should therefore work with any xdg compliant desktop or window manager.

Geomview is an interactive program for creating,
viewing, and manipulating 3D and
higher-dimensional geometric objects. Geomview can
be used as a standalone viewer for static objects
or as a display engine for other programs which
produce dynamically-changing geometry.

The Advanced Bash Scripting Guide is both a reference and a tutorial on shell scripting. This comprehensive book, the equivalent of 1,000+ print pages, covers almost every aspect of shell scripting. It contains 382 profusely commented illustrative examples, a number of tables, and a cross-linked index/glossary. Not just a shell scripting tutorial, this book also provides an introduction to basic programming techniques, such as sorting and recursion. Included scripts are the Game of Life, a Perquackey variant, a Morse code trainer, and an implementation of the Gronsfeld Cipher. This book is suited for both individual study and classroom use. It covers Bash, up to and including version 4.2.
Note that users of miniaturized single-board computers
running Linux, such as the Raspberry Pi and the Beagle
Bone, would find this Guide useful for learning and running Bash scripts to explore and expand the capabilities of these small, but powerful machines.

The OHRRPGCE (RPG Construction Engine) is a tool
for making your own retro 2D RPG games, in a style
similar to RPGs like the older Final Fantasy games
for the NES, SNES, or GBA. It includes, as an
example game, Fenrir-Lunaris's pixel-art
masterpiece "Vikings of Midgard".

Zild is a C application server with support for
the common servlet technology and servlet API in
C. It includes support for ServerPages, PHP, XML
SAX parser, HTTP/1.1 and SSL/TLS connectors, HTML
form-based and Basic Authentication access
controls, a built-in embedded SQL database, and
many more functions.

HOP is a software development kit designed for the Web 2.0. It works hand in hand with Web browsers in order to enhance the capabilities of the browsers. It is designed for programming interactive Web applications such as Web agendas, Web galleries, and music players. It is compatible with the major modern Web browsers (e.g., Firefox, Safari, Chrome, Opera, and IE 8). HOP features a versatile Web server, an optimizing native code compiler for server code, an on-the-fly JavaScript compiler for client code, an extensive set of widgets for programming fancy and portable Web GUIs, native multimedia support for enabling ubiquitous Web multimedia applications, fast WebDAV level 1 support, and an extensive set of libraries.

Mono Project is an Open Source implementation of the various ECMA and .NET framework technologies for Unix, Mac OS X, and Windows. The project includes a compiler, a class library, and a CLI runtime engine.

SLIRP is a vectorizing code generator aimed
primarily at simplifying the process of creating
modules for the S-Lang scripting language. It
supports making C, C++, and Fortran code callable
directly from the S-Lang interpreter and can
automatically vectorize functions to take
advantage of the abilities of S-Lang. SLIRP can
also generate parallelizable wrappers for
OpenMP-aware compilers.